Safety attachment for elevators.



E. DANBERRY.

- SAFETY ATTACHMENT FOR ELEVATORS.

APPLICATION FILED MAY 9, 1914.

1,174,126. Patented Mar. 7,1916.

2 SHEETSSHEET 1.

lnvento r,

Witnesses h Attor 'neys THE COLUMBM PLANOGRAPH GOA. WASHINGTON. D. c.

Patented Mar. 7, 1916.

2 SHEETS-SHEET 2.

Inventor,

I Attorneys.

E. DANBERRY.

SAFETY ATTACHMENT FOR ELEVATORS.

APPLICATION FILED MAY 9,1914. 1,174,126.

Witnesses THE COLUMBIA FLANOGRAPH 110,, WASHINGTON. D c.

WeeD PANBWIEYJOF weewrtswese i o SAFETY nmTAoHt/mnm FOR ELEvAmonsi I snee e-i To all whom it may concern Be it known .that I, .EDWABD DANBERR Y,

a citizen of ,theUnited States, residing at Cle Elum, inmjth e county of Kittitas and State of Washington, have invented a new anduseful Safety. Attachment. forlElevators, '.of which the following is a specification.

This -.i nvention relates to ,safety att achments for. elevators and, is more particularly ,designedfas an improvement upon the structure disclosed in PatentNo. 1,015,726,,issued tome on January .23, 1912.

()ne of the objects of the invention is to combine with. an elevator, a means for grip,-

ping both the ,inner'side and the front and back of each guide rail so that the gulde rail is ,thus prevented from pushing out- .wardly'pway fromthe descending'car and amore positive'gripiupon the rail is effected "than would .oth fwise ,be possible,

VVith thef foregoing and other objects in view which willfappear as the descr ption proceeds, the invention :leSlClGS 1n the com- .bination and'arrangementof parts and in the details bf construction: hereinafter described and claimed, ;being understood that changes in the precise embod ment of the invention herein disclosed, can be' made within the scope of what 'isclaimed, without departing from the spirit of the invention.

- t e a company d aw n the J91??- ferred form of the invention has been shown.

In said drawings :Figure l is a view partly in section and partly in front elevation of a portion of an elevator having the present improvements combined therewith.

Fig. 2 is a section on line AB Fig. 1. Fig. 3 is a section on line CD Fig. 1, the parts being shown in the positions assumed thereby while the attachment is gripping the guide rail. Fig. 4 is a section on line EF Fig. 1.

Referring to the figures by characters of reference, 1 designates the guide rails and 2 designates a portion of the frame of the car of the elevator, said frame including the top beams 3 on which is mounted atubular standard 4 having opposed longitudinal slots 5. A supporting cable 6 extends downwardly into the standard 4 and is provided at its lower end with an eye 7 to which are secured downwardly diverging chains 8 connected to the upper corners of the frame 2. These chains extend loosely through the Specificati on of Letters ,Ratent.

1 ig-i 1.

slots 5 and a coiled spring 9 is housed inthe and ,bears (downwardly ,upon the up p ergends of v the chains and upwardly against an interior shoulder 10 forrned or seamed int e and r Un e orma conditions, when the chains 8 and cable mam. w le uPP rt ng he car, pria 9 is held unde c prcssien- A collar 11 extends around the upper end of the st ndard .4 .,ai1,d li iably. mama on theilstandar d is ,a weight l2 con lQcted; by

chains l3 t0 Q1 icablefii A spring 110x,-

t ends around thegupper, portion] of the standard and bears atpneend, against the weightand at" its other end againstthe, col- ;larll. {This spring is normallyunder com- .pr jsi n,

as Will be seen by} ,refenringj to [A sl vel i s idai ly oun .Q 'th6 standard and has slots 1 6 through which the chains1 8 extend loosely- This Sleeve has lugs 17 extending into the slots 5 toghold the sle v aga ns rot tio o the s andar ArmSllSare pivotally connected to the,sleeve 15 diametrica ly Oppos d p nt a d d ii f d wnwa ly, thes arm ei s id:

a ly moun e ihsl 'teI- inth s es .91 r m 2 a d b in n m y s ep te ca their free ndse qa t l atoe o contac w t i e nner .s d 'ae the. resp ct v guide ra'1ls1. Spr1ngs-20 connect the top ofthe ram 2& t .$1e.e .e.l. are normally I held Iunder stress.

The parts thus far described, with the exception of the spring 14, have been disclosed in my patent hereinbefore mentioned Should the cable 6break, thus relieving the car of its supporting means, the spring 14: being released, will expand and push the Weight 12 downwardly along the standard 4 so that it will strike the sleeve 15 with considerable force. Spring 9 will at the same time expand, thus pushing the chains 8 downwardly so that they will become slack and will not retard the downward movement of the sleeve 15. This sleeve 15 will also be pulled downwardly by the springs 20 and during the movement of the sleeve 15 the materially to the effectiveness of the attachment, a shaft 21 is journaled along the outer side of each top beam 3, each shaft having an outwardly extending arm 22. Rods 23 are pivotally connected to the outer ends of these arms 22 and extend upwardly, their upper ends being pivotally connected to the sleeve 15, as shown at 24. Each shaft 21 has arms 25 depending therefrom and fixedly connected thereto, the arms on each shaft being disposed directly opposite the corresponding arms on the other shaft. The corresponding arms on the two shafts are connected by coiled springs 26 which are constantly under stress. Secured to the ends of each shaft 21 arecams 27 having toothed peripheries, the toothed portions of the cams being beveled so, that, when the said cams are brought into engagement with the guide rails ,1, they will not only serve to pinch the guide rails between them but also to draw the guide rails inwardly toward each other to a slight extent.

It will be apparent that as long as the sleeve 15 is supported in its elevated position while the car is being upheld by the cable 6, the rods 23 will pull on the arms 22 and thus hold the cams 27 out of engagement with the guide rails 1. When, however, the cable 6 breaks, thus causing the sleeve 15 to move downwardly as herein before described, the springs26 will pull inwardly on the arms 25, thus rotating the shaft2l and causing the toothed peripheries of the cams to engage the front and back faces of the guide rails 1. Consequently I the guide rails will bepinched between the cams and the gripping action exerted by the cams will increase in proportion to the porting cable for shifting said cable longi- 1 tudinally within the standard when the cable is parted, a weight slidably mounted on the standard, a spring bearing on the weight, a connection between the weight and supporting cable for holding the last named spring normally under compression, said spring constituting means for propelling the weight downwardly along the standard when the cable is parted, opposed shafts mounted for rotation upon the car, gripping members carried by and movable with the shafts, connections between the shafts and the slidable member whereby the gripping members are held normally inactive, and yielding means for automatically rotating the shafts to shift the grippingmembers to active positions during the movement of the slidable member out of its normal position.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

EDWARD DANBERRY. Witnesses:

J. V. HOEFFLER, J. LANIGAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washingtoml). C. Y 

